Roll WebRTC from 34822c65c290 to 6215ba804eb5 (3 revisions)

https://webrtc.googlesource.com/src.git/+log/34822c65c290..6215ba804eb5

2020-12-31 timothygu99@gmail.com Add preprocessor support for additional architectures
2020-12-31 timothygu@chromium.org Organize iLBC headers as per style guide
2020-12-31 webrtc-version-updater@webrtc-ci.iam.gserviceaccount.com Update WebRTC code version (2020-12-31T04:03:29).

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/webrtc-chromium-autoroll
Please CC webrtc-chromium-sheriffs-robots@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/master/autoroll/README.md

Bug: None
Tbr: webrtc-chromium-sheriffs-robots@google.com
Change-Id: I32a260e92c257d0115d80f94d96d4ba4bb541479
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2608425Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#839881}

DEPS

@@ -1514,7 +1514,7 @@ deps = {
     Var('chromium_git') + '/external/github.com/gpuweb/cts.git' + '@' + '3c2fe3888658d82b47ca831d59a2e07579619c2d',
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + '34822c65c290f82af053de7b85c350524335bb4f',
+    Var('webrtc_git') + '/src.git' + '@' + '6215ba804eb500f3e28b39088c73af3c4f4cd10a',
 
   'src/third_party/libgifcodec':
      Var('skia_git') + '/libgifcodec' + '@'+  Var('libgifcodec_revision'),